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. dr. jon lapook has more. >> reporter: worrisome news for the more than 7 million americans who have taken chantix. a new analysis links the pill to a 72% increase in the risk of heart problems. johns hopkins dr. singh led the research. >> it is causing the same problems that we are trying to prevent, that's why it's not worth the risk. we need to prevent cardio disease among smokers, not increase. >> reporter: the review combines 14 studies involving more than 8,000 patients. while a 72% increased risk sounds alarming, the companion editorial titles, is it a heartbreaker? notes that cardiovascular problems including chest pain, heart attack and stroke are still rare. occurring in only about 1% of patients taking chantix. the drugmaker pfizer questions the way the analysis was conducted. dr. gail caldwell is vice president of medical affairs for pfizer. >> we will continue to do a more in-depth look as the fda is asking us to do but to date we have not seen evidence of important risks to the heart health of patients. from chantix. >> reporter: in mid june the fda warned chantix might
" sunday, we'll have the key players from all sides: white house chief of staff bill daley and senators jon kyl, dick durban, mark warner and saxby chambliss. that's sunday on "face the nation." oslo, norway, is where the nobel peace prize is awarded, but today the city known for peace was marred by terrible violence. a powerful bomb exploded near the prime minister's office. he was not hurt, but at least seven people are dead and 15 were injured there. shortly after that, a man dressed in a police uniform opened fire with a rifle on a group of young people at a resort island. police say at least nine were killed there. an arrest was made in that shooting and police believe the two incidents are connected. we begin our coverage with jeff glor in oslo. jeff? >> reporter: bob, good evening to you. oslo is clearly a city shaken tonight. the prime minister of norway called this day "brutal." the explosions ripped through downtown oslo at 3:30 local time. the first images: windows blown out, rubble in the streets, huge plumes of smoke, evoking memories of terror attacks elsewhere but up until no
was former utah governor jon huntsman, the most moderate of the candidates vying for the anti-romney vote. huntsman has already ruled out competing in iowa and understands new hampshire is a must-win state. >> it is absolutely central to victory. this is a state you must win. >> reporter: in iowa, which votes first in a presidential contest, candidates were fighting for the social conservative vote. there were long shots newt gingrich and rick santorum. as well as tea party sensation michele bachmann. a recent poll has the minnesota congresswoman in a statistical dead heat with romney while gingrich and santorum barely made a dent in the single digits. tim pawlenty also polled poorly there. he raised a disappointing $4.2 million this quarter and has had no public event over the holiday weekend. but those in the bottom half of the poll can take comfort in the fact that the early polls don't tell us that much. this time four years ago mike huckabee was way down at 4% right where rick santorum is today. huckabee ended up winning iowa. >> jan crawford in washington this morning, thanks. >>> j
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